Dust and debris tolerant dual poppet valve connector

ABSTRACT

A debris exclusion and removal apparatus for connectors which have a dual-poppet value configuration containing a pressurized substance. Coupling of the female and male connectors causes the poppet valve to eject a cleaning substance which will eliminate debris from the male connector prior to mating with the female connector.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a divisional of U.S. patent application Ser. No.14/207,472, filed on Mar. 12, 2014, and claims the benefit of priorityunder 35 U.S.C. §119(e) to U.S. Provisional Application Ser. No.61/778,387, filed Mar. 12, 2013; Provisional Application Ser. No.61/779,045, filed on Mar. 13, 2013; Provisional Application Ser. No.61/779,200, filed on Mar. 13, 2013; Provisional Application Ser. No.61/779,292, filed on Mar. 13, 2013; and Provisional Application Ser. No.61/779,367, filed on Mar. 13, 2013, the contents of which areincorporated herein by reference in their entirety.

ORIGIN OF THE INVENTION

The invention described herein was made in the performance of work undera NASA contract and by employees of the United States Government and maybe manufactured and used by or for the Government for governmentalpurposes without the payment of any royalties thereon or therefore.

BACKGROUND OF THE INVENTION

Technical Field

Embodiments of the invention generally relate to connectors. Moreparticularly, embodiments relate to dust tolerant connectors. Someembodiments also relate to an intelligent connector system capable ofdetecting damage to or faults within a conductor and then rerouting theenergy to a non-damaged spare conductor.

Discussion

Connectors of the present invention may be used to transfer electricalcurrent, fluid, and gas in a wide variety of environments containingdust and other debris, wherein that debris may present substantialchallenges. For example, lunar/Martian dust intrusion and/oraccumulation in connectors used to transfer oxygen, hydrogen, nitrogen,etc., may lead to larger system failures as well as loss of life inextraterrestrial human exploration endeavors. Additionally, embodimentsof the present invention may also be suitable for use where connectorsmust resist water intrusion, such as terrestrial deep water operations.

BRIEF DESCRIPTION OF THE DRAWINGS

The various advantages of the embodiments of the present invention willbecome apparent to one skilled in the art by reading the followingspecification and appended claims, and by referencing the followingdrawings, in which:

FIGS. 1A-1H show isometric and side views of examples of apparatuseshaving inverting end caps with a multi-axis lever configurationaccording to embodiments;

FIGS. 2A-2J show isometric and side views of examples of apparatuseshaving inverting end caps with enlarged handle and/or side railconfigurations according to embodiments;

FIGS. 3A-3G show isometric and side views of an example of an apparatushaving a rotating end cap configuration according to an embodiment;

FIGS. 4A-4E show sectional views of an example of an apparatus having apoppet valve configuration according to an embodiment;

FIGS. 5A and 5B show side views of an example of an apparatus having anO-ring configuration according to an embodiment;

FIGS. 6A-6C show side views of examples of apparatuses having a filamentbarrier configuration according to embodiments;

FIGS. 7A-7H show isometric, cut-away, side and end views of an exampleof a retractable cover configuration according to embodiments;

FIGS. 8A and 8B show isometric views of an example of a clamshellconfiguration according to an embodiment;

FIGS. 9A-9D show isometric views of an example of a flip capconfiguration according to an embodiment;

FIGS. 10A and 10B show block diagrams of examples of an intelligentelectrical connector according to an embodiment; and

FIGS. 11A-11D show isometric and cut-away views of an example of aretractable cover configuration according to additional embodiments.

DETAILED DESCRIPTION OF THE INVENTION

The intrusion and/or accumulation of dust and other debris orcontaminants within electrical, fluid, and/or gas connectors may beprevented via a number of techniques described herein. The techniquesmay provide for rapid, clean connections, as well as quick disconnect(QD) operability by individuals wearing thick gloves (e.g., astronauts,drilling personnel, manufacturing personnel, deep-sea divers, etc.)without compromising the internal or external mating surfaces. Forexample, debris exclusion and removal apparatuses having 1) invertingend caps with a multi-axis lever configuration, 2) inverting end capswith enlarged handle and/or side rail configurations, 3) rotating endcap configurations, 4) poppet valve configurations, 5) O-ringconfigurations, 6) filament barrier configurations, 7) retractable coverconfigurations, 8) clamshell end cap configurations, etc., or anycombination thereof, may be used to improve both the operability and thesafety of connections in a wide variety of harsh environments.

Inverting End Caps—Multi-Axis Lever

FIGS. 1A-1H show a set of housings 20 (20 a, 20 b) that may be used tocouple a corresponding pair of connectors (not shown) to one another inan environment containing dust, debris, and/or other contaminants. Asbest shown in FIGS. 1B and 1H, a first housing 20 a may include an openend 22 and one or more surfaces defining a first cavity toreceive/contain a first connector such as, for example, an electricalconnector, a fluid connector, a gas connector, etc., or any combinationthereof. The illustrated first housing 20 a also has a first cap 24(e.g., an “end cap”) that is movable between a closed position (e.g., asshown in FIG. 1A) in which the open end 22 of the first housing 20 a iscovered by the first cap 24 and an open position (e.g., as shown inFIGS. 1B-1H) in which the open end 22 of the first housing 20 a is notcovered by the first cap 24.

In addition, a first hinge 26 may be coupled to the first housing 20 aand the first cap 24, wherein the first hinge 26 inverts the first cap24 between the closed position and the open position. As best shown inFIG. 1H, the first hinge 26 may include a bending tension spring 28having a shape memory alloy that biases the first cap 24 toward theclosed position. Such a biasing operability may ensure that the firsthousing 20 a automatically closes before touching the ground if droppedby an individual handling the first housing 20 a. Indeed, the

automatic closing of the first housing 20 a may be particularlyadvantageous if the ground and/or floor of the environment contains arelatively large amount of debris or other contaminants.

The illustrated first housing 20 a also includes a first multi-axislever 30 (e.g., a “lazy tong”) coupled to the external surface of thefirst housing 20 a and the first hinge 26. The first multi-axis lever 30(30 a, 30 b) may generally invert the first cap 24 to the open position(e.g., actuate) when the first multi-axis lever 30 is squeezed towardthe external surface of the first housing 20 a. In the illustratedexample, the first multi-axis lever 30 includes a first member 30 ahaving a fixed end coupled to the first housing 20 a via a pin thatprovides an axis of rotation, and a second member 30 b having a firstfree end coupled to a free end of the first member 30 a via another pinthat provides another axis of rotation. The second member 30 b may alsohave an intermediate point coupled to the first housing 20 a via a pinthat provides yet another axis of rotation so that squeezing the firstmember 30 a toward the external surface of the first housing 20 a causesa second free end of the second member 30 b to rotate away from externalsurface of the first housing 20 a.

As best seen in FIGS. 1B and 1H, the second free end of the secondmember 30 b may include a hook 32 and the first cap 24 may include aprotrusion 34 at a periphery of the first cap 24, wherein the hook 32engages with the protrusion 34 when the first cap 24 is in the closedposition. Moreover, the second free end of the second member 30 b may becoupled to the first cap 24 via a cable 36 that enters the first housing20 a on one side wraps around an interior region of the first housing 20a, exits the first housing 20 a on the other side, loops over the pin ofthe first hinge 26 (as best shown in FIG. 1A) and attaches to the firstcap 24. Accordingly, when the second free end of the second member 30 bmoves away from the first housing 20 a, the cable 36 pulls the first cap24 to the open position, in the illustrated example. Of particular noteis that the illustrated approach provides a relatively high amount ofrotational movement on the part of the first cap 24 (e.g., 180°+), byvirtue of a relatively small amount of linear movement of the free endof the first member 30 a (e.g., on the order of centimeters). As aresult, the illustrated first housing 20 a can be actuated with verylittle effort by individuals wearing thick gloves (e.g., having limitedmanual dexterity).

In addition, a second housing 20 b may include an open end 38 and one ormore surfaces defining a second cavity to receive/contain a secondconnector such as, for example, an electrical connector, a fluidconnector, a gas connector, etc., or any combination therefore, thatmates with the first connector of the first housing 20 a. Theillustrated second housing 20 b has a second cap 40 (e.g., end cap)coupled to the second housing 20 b, and a second hinge 42 coupled to thesecond housing 20 b and the second cap 40, wherein the second hinge 42inverts the second cap 40 between the closed position and the openposition. As best shown in FIGS. 1F and 1G, when the open end of thefirst housing 20 a and the open end of the second housing 20 b arecoupled to one another, the first cap 24 and the second cap 40 seal oneanother.

In this regard, the first cap 24 may also include a gasket 44 toeffectuate the seal between the first cap 24 and the second cap 40.Moreover, the gasket 44 may be used to improve the seal between thefirst cap 24 and a corresponding surface 46 (e.g., best shown in FIG.1H) of the first housing 20 a when the first cap 24 is in the closedposition. A similar gasket (not shown) may be provided on a surface 48(e.g., best shown in FIG. 1H) of the second housing 20 b that interfaceswith the second cap 40 when the second cap 40 is in the closed position.Additionally, the open end 22 of the first housing 20 a may include aset of laterally extending protrusions 50 that correspond to a set ofapertures 52 in the open end 38 of the second housing 20 b, wherein theprotrusions 50 and apertures 52 operate as a cam and groove couplingthat locks the first and second housings 20 to one another via rotation.The rotation may in fact cause a friction based removal of contaminantsfrom surfaces such as, for example, the surface 46 and/or the surface48. The second housing 20 b may have a multi-axis lever similar to thatof the first housing 20 a.

Inverting End Caps—Enlarged Handle and/or Side Rail

FIGS. 2A-2E show another example of a set of housings 54 (54 a, 54 b)that may be used to couple a corresponding pair of connectors to oneanother in an environment containing dust and/or other debris. A firsthousing 54 a may have an open end and one or more surfaces defining afirst cavity to receive/contain a first connector (e.g., including a setof pins, as best shown in FIG. 2B). The first housing 54 a may alsoinclude a first cap 56 coupled to the first housing 54 a, wherein thefirst cap 56 is movable between a closed position (e.g., as shown inFIG. 2A) in which the open end of the first housing 54 a is covered bythe first cap 56 and an open position (e.g., as shown in FIGS. 2B-2E) inwhich the open end of the first housing 54 a is not covered by the firstcap 56. In addition, a first hinge may be coupled to the first housing54 a and the first cap 56, wherein the first hinge inverts the first cap56 between the closed position and the open position.

Similarly, a second housing 54 b may include an open end (e.g., as bestshown in FIG. 2C) and one or more surfaces defining a second cavity toreceive/contain a second connector (e.g., including a socket, as bestshown in FIG. 2C). The illustrated second housing 54 b also includes asecond cap 58 coupled to the second housing 54 b and a second hingecoupled to the second housing 54 b and the second cap 58, wherein thesecond hinge inverts the second cap 58 between the closed position andthe open position. As best shown in FIGS. 2D and 2E, when the open endof the first housing 54 a and the open end of the second housing 54 bare coupled to one another, the first cap 56 and the second cap 58 mayseal one another.

More particularly, a first handle is coupled to the first cap 56, asecond handle is coupled to the second cap 58, and a locking system isused to effectuate the seal between the first cap 56 and the second cap58, in the illustrated example. The locking system may include anactuation rod extending laterally through a longitudinal slot of thesecond housing 54 b and a rotatable sleeve 60 external to the secondhousing 54 b. In one example, the actuation rod is coupled to the secondconnector and the rotatable sleeve 60 is coupled to the actuation rod sothat rotating the sleeve 60 upward (e.g., counterclockwise in FIG. 2Apushes the actuation rod forward in the longitudinal slot and in turnfully mates the two connectors with one another so that the caps 56, 58press against one another. Moreover, an additional component such as atorsional spring may be used at the hinged connection between the caps56, 58 and their respective housings in order to bias the caps 56, 58toward one another in the mated position. The enlarged handles and thelocking mechanism may enable the housings 54 to be connected with verylittle effort by individuals wearing thick gloves.

FIGS. 2F-2J show yet another example of a set of housings 62 (62 a, 62b) that may be used to couple a corresponding pair of connectors to oneanother in an environment containing dust and/or other debris. A firsthousing 62 a may have an open end and one or more surfaces defining afirst cavity to receive/contain a first connector. The first housing 62a may also include a first cap 64 coupled to the first housing 62 a,wherein the first cap 64 is movable between a closed position (e.g., asshown in FIGS. 2F and 2G) in which the open end of the first housing 62a is covered by the first cap 64 and an open position (e.g., as shown inFIGS. 2H-2J) in which the open end of the first housing 62 a is notcovered by the first cap 64. In addition, a first hinge 66 may becoupled to the first housing 62 a and the first cap 64, wherein thefirst hinge 66 inverts the first cap 64 between the closed position andthe open position. In the illustrated example, the first hinge 66includes a two-piece configuration in which each piece has an oblongslot that rides along a pin protruding from the side of the firsthousing 62 a.

Similarly, a second housing 62 b may include an open end and one or moresurfaces defining a second cavity to receive/contain a second connector.The illustrated second housing 62 b also includes a second cap 68coupled to the second housing 62 b and a second hinge 70 coupled to thesecond housing 62 b and the second cap 68, wherein the second hinge 70inverts the second cap 68 between the closed position and the openposition. In the illustrated example, the second hinge 70 also includesa two-piece configuration in which each piece has one or more surfacesdefining an oblong slot that rides along a pin protruding from the sideof the second housing 62 b.

In one example, a plurality of side rails 72 are coupled to the exteriorof the first housing 62 a, wherein each side rail 72 includes one ormore surfaces defining a longitudinal slot. Additionally, the apparatus62 may include a plurality of dual-member linkages 74, wherein eachdual-member linkage 74 rests in a longitudinal slot of a correspondingside rail 72 and forces the first and second caps 64, 68 open when thesecond housing 62 b is mated with the plurality of side rails 72 (e.g.,as best shown in FIGS. 2G and 2H). In this regard, the second housing 62b may include a plurality of side channels 76 (e.g., as best shown inFIG. 2J) through which the side rails slide during mating and de-mating.The first housing 62 a may also include a frame 78 extending between theside rails 72 and around the first housing 62 a to provide structuralsupport to the side rails 72 (e.g., particularly at their distal ends).As best shown in FIGS. 2I and 2J, when the open end of the first housing62 a and the open end of the second housing 62 b are coupled to oneanother, the first cap 64 and the second cap 68 may seal one another.

Rotating End Caps

Turning now to FIGS. 3A-3G, a first housing 80 having an open end 84,one or more surfaces defining a cavity to receive/contain a connector86, and a rotatable cap 82 is shown. More particularly, FIG. 3Ademonstrates that the cap 82 covers the open end 84 of the first housing80 in the closed position and FIG. 3B demonstrates that the cap 82 doesnot cover the open end 84 of the first housing 80 in the open position.Moreover, a side piece 88 may be coupled to the external surface of thefirst housing 80, wherein the cap 82 includes a wiper 90 (e.g., sealingand/or doctoring blade, as best shown in FIG. 3C) positioned on theunderside of the cap 82. The wiper 90 may brush against the externalsurface of the side piece 88 as the cap 82 rotates to the open position.The illustrated wiper 90 also seals the open end 84 of the first housing80 when the cap 82 is in the closed position. As best shown in FIGS.3D-3G, a set of pins 92 may extend from opposing sides of the firsthousing 80 and define an axis, wherein the cap 82 is coupled to thefirst housing 80 via the set of pins 92, and wherein the cap 82 isrotatable about the axis defined by the set of pins 92.

Additionally, a pair of housings 80, 81 may be used, wherein the openends 84 of the housings 80, 81 mate with one another to form anelectrical, fluid and/or gas connection. Thus, a second housing 81 mayalso have surfaces defining a cavity to receive/contain a connector anda cap 82 coupled to the second housing 81, wherein the cap 82 isrotatable between the closed position and the open position. In theillustrated example, an actuator assembly is used to form the connectionbetween the housings 80, 81 and their respective connectors. Moreparticularly, the actuator assembly may include an actuator arm 94 andone or more surfaces that define a cavity to receive/contain the firstand second housings 80, 81. Moreover, the actuator arm 94 may be coupledto the first housing 80 and move the first housing 80 longitudinallywithin the cavity of the actuator assembly during transitions of thecaps 82 between the closed position and the open position.

In one example, a first set of pins 96 extend from opposing sides of thefirst housing 80, wherein the actuator assembly further includes one ormore surfaces defining a plurality of longitudinal slots 98 to receivethe first set of pins 96 and guide the first housing 80 longitudinallywithin the third cavity during transitions of the caps 82 between theclosed position and the open position. Additionally, a second set ofpins 100 may extend from opposing sides of the second housing 81,wherein the actuator assembly further includes one or more surfacesdefining a plurality of stabilizing slots 102 (e.g., best shown in FIG.3D) to receive the second set of pins 100. The illustrated actuatorassembly further includes a third set of pins 104 extending fromopposing sides of the second housing 81, wherein the plurality oflongitudinal slots 98 receive the third set of pins 104 and guide theactuator arm 94 longitudinally during transitions of the caps 82 betweenthe closed position and the open position.

Poppet Valves

FIGS. 4A-4E show a debris exclusion and removal apparatus 106 having amale connector 108 and a female connector 110. More particularly, FIGS.4A-4E sequentially demonstrate a mating process between the maleconnector 108 and the female connector 110. In the illustrated example,the male connector 108 includes a first poppet valve 112 positionedbetween an inlet end of the male connector 108 and a first chamber 114of the male connector 108. More particularly, the first poppet valve 112may include a plunger that is spring loaded against a stationary pieceby virtue of a spring 124. The female connector 110 may include a secondpoppet valve 116 positioned between an outlet end of the femaleconnector 110 and a second chamber 118 of the female connector 110,wherein a third poppet valve 120 may be positioned between the secondchamber 118 and a third chamber 122 of the female connector 110. Theillustrated third poppet valve 120 includes a plunger that is springloaded against the outer shell of the female connector 110 (e.g., astationary piece) by virtue of a spring 126.

In general, when the inlet end of the female connector 110 is coupled toa source (not shown) of a pressurized substance (e.g., oxygen, hydrogen,nitrogen), the third chamber 122 supplies the second chamber 118 withthe pressurized substance during a “charging stage.” In this regard, thethird poppet valve 120 may include one or more surfaces defining asecondary substance path 128 to supply the second chamber 118 with thepressurized substance during the charging stage. As shown in FIG. 4B,when the second chamber 118 contains the pressurized substance, couplingthe male connector 108 to the female connector 110 causes thepressurized substance in the second chamber 118 to clean the inlet endof the male connector 108 (e.g., following the path of the arrows).Moreover, when the second chamber 118 contains the pressurizedsubstance, decoupling the male connector 108 from the female connector110 causes the pressurized substance in the second chamber 118 to cleanthe inlet end of the male connector 108.

As best shown in FIG. 4E, the third poppet valve 120 includes one ormore surfaces defining a primary substance path 130 to supply the maleconnector 108 with the pressurized substance during a “supply stage”(e.g., following the path of arrows). In one example, the third poppetvalve 120 has an actuation force that is greater than the actuationforce of the first poppet valve 112 and the second poppet valve 116. Asa result, the illustrated order of activation is the second poppet valve116 (e.g., as shown in FIG. 4B), then the first poppet valve 112 (e.g.,as shown in FIG. 4D), and then third poppet valve 120 (e.g., as shown inFIG. 4E). In general, the second and third chambers 118, 122 maymaintain the transferred substance at a relatively high pressure (e.g.,3800 psi), whereas the first chamber 114 may maintain the transferredsubstance at a relatively low pressure (e.g., 200 psi).

O-Rings

FIGS. 5A and 5B show a debris exclusion and removal apparatus 132 (132a, 132 b) in a de-mated configuration (FIG. 5A) and a matedconfiguration (FIG. 5B). In the illustrated example, a female connector132 a has a bore 138 (e.g., an elongated configuration) and a maleconnector 132 b has a shaft 136 (e.g., an elongated configuration) thatmates with the bore 138 of the female connector 132 a. A plurality ofO-rings 134 (134 a-134 c) may be positioned along either one of theshaft 136 or the bore 138. The O-rings 134 may generally clean theinterior of the apparatus 132 during mating and de-mating, as well asform a longitudinal seal along the apparatus 132 while the maleconnector 132 b remains coupled to the female connector 132 a. Indeed,the longitudinal seal, which may have a length that is substantiallyequal to an entire length of the bore 138, may maintain the interior ofthe apparatus 132 in a clean state.

In the illustrated example, the plurality of O-rings 134 includes a pairof O-rings 134 a, 134 c positioned at opposing ends of the apparatus 132and a third O-ring 134 b positioned approximately mid-way between thepair of O-rings 134 a, 134 b. Such a configuration may ensure that atleast two of the O-rings 134 engage and wipe the surface being cleanedas the male connector 132 b passes through the female connector 132 a.The illustrated shaft 136 of the male connector 132 b includes acorresponding plurality of grooves in which the plurality of O-rings 134sit. In such a case, the O-rings 134 clean the bore 138 of the femaleconnector 132 a when the male connector 132 b is either being coupled toor decoupled from the female connector 132 a. Alternatively, the bore138 of the female connector 132 a may include a corresponding pluralityof grooves in which the plurality of O-rings 134 sit, wherein couplingthe male connector 132 b to, or decoupling the male connector 132 bfrom, the female connector 132 a causes the O-rings to clean the shaft136 of the male connector 132 b.

Filament Barriers

FIGS. 6A-6C show debris exclusion and removal apparatuses that may beused to transfer substances and/or electrical current in dusty and/orotherwise unclean environments. For example, FIG. 6A shows an apparatus140 (140 a, 140 b) having a first housing 140 a with an open end and afirst columnar array of filaments 142 extending across the open end ofthe first housing 140 a. The first housing 140 a may also include afirst connector positioned within the first housing 140 a, wherein thefirst columnar array of filaments 142 are spaced closely enough togetherto prevent dust particles and other debris from reaching the interior ofthe first housing 140 a and contaminating the first connector (e.g., aclean state).

The illustrated apparatus 140 also includes a second housing 140 bhaving an open end and a second columnar array of filaments 144extending across the open end of the second housing 140 b. A secondconnector may be positioned within the second housing 140 b, wherein analignment system 146 may arrange the first columnar array of filaments142 at a non-zero angle (e.g., 90°, 45°, etc.) with respect to thesecond columnar array of filaments 144 when the first housing 140 a iscoupled to the second housing 140 b. Similarly, the second columnararray of filaments 144 may be spaced closely enough together to maintainthe interior of the second housing 140 b in a clean state. The first andsecond columnar arrays of filaments 142, 144 may be made of any materialhaving an elastic response with no hysteresis (e.g., thread, rubber,TEFLON, etc.). Additionally, more than two arrays of filaments may beused, depending upon the circumstances.

FIG. 6B demonstrates that the first connector may include an electricalconnector having one or more pins 148 that are cleaned by the first andsecond columnar arrays of filaments 142, 144 when the pins 148 areextended and mated with a corresponding socket 150 in the second housing140 b. FIG. 6C demonstrates that the first connector may also include afluid connector (e.g., for liquid and/or gas) having one or more malemating surfaces 152 that are extended and cleaned by the first andsecond columnar arrays of filaments 142, 144 after the first housing 140a is coupled to the second housing 140 b and the one or more male matingsurfaces 152 are mated with one or more corresponding female matingsurfaces 156 in the second housing 140 b. In either instance, anactuation system 154 may force the pins 148 and/or the male matingsurfaces 152 through the first and second columnar arrays of filaments142, 144 after the first housing 140 a is coupled to the second housing140 b. The actuation system 154 may be electrical, mechanical,hydraulic, pneumatic, etc., and may be controlled remotely or locally atthe apparatus 140.

Retractable Covers

FIGS. 7A-7H show a debris exclusion and removal apparatus 158 (158 a,158 b, e.g., a “blade connector”) that may be used to transferelectrical current in a dusty and/or otherwise unclean environment. Inthe illustrated example, a first connector 158 a has a male member 160with a first retractable cover 162 (e.g., spring loaded) positionedabout the exterior of the male member 160 (as best shown in FIG. 7G,with the cover forced open). Additionally, a second connector 158 b mayinclude a female member having a second retractable cover 164 (e.g.,spring loaded) positioned within the interior of the female member. Inone example, an internal dust trapping feature of the illustrated bladeconnector may be provided against the surfaces perpendicular to thelongitudinal axis of the apparatus 158. More particularly, the internaldust trapping feature may prevent contamination from rapidly propagatingthroughout the internal mechanisms of the apparatus 158. Thus, dust doesnot propagate throughout the apparatus 158 on a first use, in theillustrated example.

The male member 160 may have an outer diameter that is greater than theinner diameter of the second retractable cover 164 so that the malemember 160 retracts the second retractable cover 164 when the first andsecond connectors 158 a, 158 b are coupled to one another. Similarly,the female member may have an inner diameter that is less than the outerdiameter of the first retractable cover 162 so that the female memberretracts the first retractable cover 162 when the first and secondconnectors 158 a, 158 b are coupled to one another. As previouslystated, the coupling of the first and second connectors 158 a, 158 b ofthe apparatus 158 traps (i.e., sandwiches) any dust or othercontaminants internally between the mated surfaces of the first andsecond retractable covers 162, 164.

As best shown in FIGS. 7G and 7H, the first connector 158 a may includea plurality of wafers 166 positioned along the male member 160, whereineach wafer may have a non-uniform shape (e.g., winged shape). Moreover,the male member 160 and the second retractable cover 164 may havechamfered cross sections (e.g., best shown in FIG. 7G, the end view ofFIG. 7E, and FIG. 11A) that mate with one another (e.g., providing akeyed connection). In such a case, rotation of the first connector 158 awithin the second connector 158 b during the coupling process may forcethe plurality of wafers 166 to protrude from the male member 160.Additionally, the female member may include a plurality of contacts 168positioned to align with the plurality of wafers when the firstconnector 158 a is coupled to the second connector 158 b. Accordingly,the wiping motion between the wafers 166 and the contacts 168 mayimprove continuity by removing any oxides that may be present.

FIGS. 11A-11D show a debris exclusion and removal apparatus 230 having aretractable cover configuration according to additional embodiments ofthe present invention.

Additional Embodiments—Clamshell End Cap

FIGS. 8A and 8B show a debris exclusion and removal apparatus 170 havinga clamshell configuration. More particularly, the apparatus 170 mayinclude a housing 172 having an open end and one or more surfacesdefining a first cavity to receive a first connector 174. Theillustrated apparatus 170 also includes a first cap segment 176 coupledto the housing 172, wherein the first cap segment 176 is movable betweena first closed position (as shown in FIG. 8A) in which a first portion(e.g., top half) of the open end is covered by the first cap segment 176and a first open position in which the first portion of the open end isnot covered by the first cap segment 176. Similarly, a second capsegment 178 may be coupled to the housing 172, wherein the second capsegment 178 is also movable between a second closed position in which asecond portion (e.g., bottom half) of the open end is covered by thesecond cap segment 178 and a second open position in which the secondportion of the open end is not covered by the second cap segment 178.Thus, placing the cap segments 176, 178 in their respective closedpositions may enable the apparatus 170 to prevent dust and other debrisfrom coming in contact with the connector 174.

In one example, a first hinge configuration 180 is coupled to thehousing 172 and the first cap segment 176, and a second hingeconfiguration 182 is coupled to the housing 172 and the second capsegment 178. Moreover, the apparatus 170 may also include a set ofspreader members 184, wherein each spreader member 184 has a firstextremity coupled to the first cap segment 176, a second extremitycoupled to the second cap segment 178, and a third extremity coupled tothe housing 172. In the illustrated example, each spreader member 184forms a Y-shape (as shown in FIG. 8B) when the first cap segment 176 isin the first open position and the second cap segment 178 is in thesecond open position. Although only one spreader member 184 is visiblein the views shown, the apparatus 170 may include a pair of spreadermembers 184 positioned on opposite sides of the housing 172.

Additionally, a set of pins 186 may extend laterally from an exterior ofthe housing 172, wherein a rotatable sleeve 188 (e.g., having a largehandle) may be coupled to the exterior of the housing 172. Although onlyone pin 186 is visible in the views shown, the apparatus 170 may includea pair of pins 186 positioned on opposite sides of the housing 172. Inthe illustrated example, each pin 186 is coupled to the rotatable sleeve188 and one of the third extremities of the spreader members 184.Moreover, the rotatable sleeve 188 is coupled to the exterior of thehousing 172 via a set of rotatable linkage members in the example shown.Thus, rocking the rotatable member 188 forward may cause the capsegments 176, 178 to part and enable the connector 174 to be mated withanother connector (not shown).

In an additional embodiment of the clamshell end cap configuration, anexisting off-the-shelf (COTS) connector (e.g., Amphenol® AstronautZero-G Connector) is adapted for use in dusty and/or contaminatedenvironments as a debris exclusion and removal apparatus. Morespecifically the clamshell cap segments 176, 178 are coupled to anexisting COTS connector housing in a manner similar to what haspreviously been described for the clamshell cap configuration.

Additional Embodiments—Flip Cap

FIGS. 9A-9D show a debris exclusion and removal apparatus 190 (FIGS. 9Cand 9D) having a flip cap configuration. In the illustrated example, afirst portion 191 a includes a first housing 194 with an open end andone or more surfaces defining a first cavity to receive a firstconnector (201 of FIG. 9D). In addition, a first cap 192 may be coupledto the first housing 194, wherein the first cap 192 is movable between aclosed position (as shown in FIG. 9A) in which the open end of the firsthousing 194 is covered by the first cap 192 and an open position (asshown in FIG. 9B) in which the open end of the first housing 194 is notcovered by the first cap 192.

A first hinge 196 may also be coupled to the first housing 194 and thefirst cap 192, wherein the first hinge 196 inverts the first cap 192between the closed position and the open position. The illustrated firstportion 191 a also includes a first pin 198 extending laterally from thehinge, wherein a side rail 200 may extend longitudinally along theexterior of the first housing 194. The side rail 200 may have a firstend 202 with surfaces defining an L-shaped (e.g., “sliding yoke”)aperture to receive the first pin 198. Moreover, a multi-axis lever 204(e.g., a full “lazy tong,” a half “lazy tong,” etc.) may be coupled tothe first housing 194 and a second end 206 of the side rail 200, whereinthe multi-axis lever 204 inverts the first cap 192 to the open positionwhen the multi-axis lever 204 is squeezed toward the side rail 200.

As best shown in FIG. 9C, a second portion 191 b of the apparatus 190may also have a second housing 208 with an open end and one or moresurfaces defining a second cavity to receive a second connector (203 ofFIG. 9D). A second cap 210 may be coupled to the second housing 208,wherein the second cap 210 is movable between a closed position in whichthe open end of the second housing 208 is covered by the second cap andan open position in which the open end of the second housing 208 is notcovered by the second cap 210. The second portion 191 b may also includea pin 198, side rail 200 and multi-axis lever 204 as already describedwith regard to the first portion 191 a. Thus, when the open end of thefirst housing 194 and the open end of the second housing 208 are coupledto one another, the illustrated first and second caps 192, 210 seal oneanother. Such a seal may prevent dust and other debris from collectingwithin the first and second caps 192, 210.

Additionally, the open end of the first housing 191 a may include a setof laterally extending protrusions 205 (as best shown in FIG. 9D) thatare equi-angularly spaced apart from one another, wherein eachprotrusion corresponds to a set of apertures 207 in the open end of thesecond housing 191 b. Furthermore, the protrusions 205 and apertures 207operate as a cam and groove coupling that locks the first and secondhousings to one another via rotation. It should also be noted that thetwo halves (191 a, 191 b) of the apparatus 190 are mirror images of eachother with respect to the hinge 196 location, such that the two hinges,one on each half (191 a, 191 b) of the apparatus 190, do not interferewith each other when the two parts of apparatus 190 are rotated andlocked together.

Additional Embodiments—Intelligent Electrical Connector

FIGS. 10A and 10B show an intelligent electrical connector 212 having aminiaturized configuration that is easily maintainable and serviceable(e.g., cable harnesses do not require disconnecting to diagnoseconductor faults/damage). In the illustrated example, a housing 214contains a plurality of conductors 216 (e.g., contacts, pins, sockets,wires, cables) coupled to a first port 218 and a second port 220. Thehousing 214 may generally have a small form factor that enables variouscomponents of a system to be connected to one another. For example, FIG.10A demonstrates that the electrical connector 212 might be installed atopposing ends of a cable 226 having a set of conductors to transferelectrical current (e.g., signals and/or power) therebetween. In theillustrated example, a tester 222 is positioned within the housing 214,wherein the tester 222 may be configured to detect one or more faultsassociated with one or more of the plurality of conductors 216.Additionally, a switch matrix 224 may be positioned within the housing214, wherein the switch matrix 224 is configured to cure the one or morefaults with a re-routing of one or more of the plurality of conductors216.

The electrical connector 212 may also include a wireless module 228coupled to the tester 222 and the switch matrix 224, wherein thewireless module 228 may transmit notification information associatedwith the fault to a remote location (e.g., remote processor, server,facility, etc.). In such a case, the wireless module 228 may receiveconfiguration information from the remote location, wherein the switchmatrix 224 performs the re-routing based on the configurationinformation.

The tester 222 and/or the remote location may generally use time domainreflectometry (TDR) to detect open, shorted and intermittent circuits.Moreover, the switch matrix 224 may autonomously transferdamaged/defective conductors to alternate wire paths. The switch matrix224 may also use interchangeable modular elements such asmicroelectromechanical systems (MEMS) to perform the re-routing. In apreferred embodiment, the switch matrix should be of the latching typeto maintain configuration during power cycles. In one example, thecontents of the housing 214 are integrated onto a common printed circuitboard (PCB) (e.g., rigid, flexible), which facilitates miniaturizationof the intelligent electrical connector 212.

One or more of the techniques described herein may be used separately orin combination with one another to enable the safe transfer ofelectrical current, fluid, and/or gas in harsh environments containingairborne debris as well as debris on the ground and/or floor.

Embodiments may therefore include a debris exclusion and removalapparatus comprising a first housing having an open end and one or moresurfaces defining a first cavity to receive a first connector, and afirst cap coupled to the first housing, wherein the first cap is movablebetween a closed position in which the open end of the first housing iscovered by the first cap and an open position in which the open end ofthe first housing is not covered by the first cap.

Embodiments may also include a debris exclusion and removal apparatuscomprising a male connector including a first poppet valve positionedbetween an inlet end of the male connector and a first chamber of themale connector, and a female connector including a second poppet valvepositioned between an outlet end of the female connector and a secondchamber of the female connector, and a third poppet valve positionedbetween the second chamber and a third chamber of the female connector,wherein when the second chamber contains a pressurized substance,coupling the male connector to the female connector causes thepressurized substance in the second chamber to clean the inlet end ofthe male connector.

Embodiments may also include a debris exclusion and removal apparatuscomprising a female connector having an elongated configuration, a maleconnector having an elongated configuration that mates with theelongated configuration of the female connector, and a plurality ofO-rings positioned along one of a shaft of the male connector or a boreof the female connector.

Embodiments may also include a debris exclusion and removal apparatuscomprising a first housing including an open end and a first columnararray of filaments extending across the open end of the first housing,and a first connector positioned within the first housing.

Embodiments may also include a debris exclusion and removal apparatus,comprising a first connector having a male member with a firstretractable cover positioned about an exterior of the male member, and asecond connector having a female member with a second retractable coverpositioned within an interior of the female member.

The term “coupled” may be used herein to refer to any type ofrelationship, direct or indirect, between the components in question,and may apply to electrical, mechanical, fluid, optical,electromagnetic, electromechanical or other connections. In addition,the terms “first,” “second,” etc. may be used herein only to facilitatediscussion, and carry no particular temporal or chronologicalsignificance unless otherwise indicated.

Those skilled in the art will appreciate from the foregoing descriptionthat the broad techniques of the embodiments of the present inventioncan be implemented in a variety of forms. Therefore, while theembodiments of this invention have been described in connection withparticular examples thereof, the true scope of the embodiments of theinvention should not be so limited since other modifications will becomeapparent to the skilled practitioner upon a study of the drawings,specification, and following claims.

We claim:
 1. A debris exclusion and removal apparatus comprising: a maleconnector including a first poppet valve positioned between an inlet endof the male connector and a first chamber of the male connector; and afemale connector including a second poppet valve positioned between anoutlet end of the female connector and a second chamber of the femaleconnector, and a third poppet valve positioned between the secondchamber and a third chamber of the female connector, wherein when thesecond chamber contains a pressurized substance, coupling the inlet endof the male connector to outlet end of the female connector causes thepressurized substance in the second chamber to clean the inlet end ofthe male connector; wherein when an inlet end of the female connector iscoupled to a source of the pressurized substance, the third chambersupplies the second chamber with the pressurized substance during acharging stage.
 2. The apparatus of claim 1, wherein when the secondchamber contains the pressurized substance, decoupling the maleconnector from the female connector causes the pressurized substance inthe second chamber to clean the inlet end of the male connector.
 3. Theapparatus of claim 1, wherein the second poppet valve includes one ormore surfaces defining a secondary substance path to supply the secondchamber with the pressurized substance during the charging stage.
 4. Theapparatus of claim 1, wherein the third poppet valve includes one ormore surfaces defining a primary substance path to supply the maleconnector with the pressurized substance during a supply stage.
 5. Theapparatus of claim 1, wherein the third poppet valve has an actuationforce that is greater than an actuation force of the first poppet valveand the second poppet valve.